Preface: Introduction and Perspectives; H. Friedman, T.W. Klein, J. Madden. 1. Targeting the Brain's Immune System: A Psychopharmacological Approach to Central Nervous System Infection; P.K. Peterson, et al. 2. Model Systems for Assessing Cognitive Function: Implications for HIV-1 Infection and Drugs of Abuse; W.E. Zink, et al. 3. Direct and Indirect Mechanisms of HIV-1 Neuropathogenesis in the Human Central Nervous System; J. Hou, E.O. Major. 4. Chemokine Receptors on Brain Endothelia - Keys to HIV-1 Infection and Drugs of Abuse? M. Fiala, et al. 5. Neurotropic Factor Regulation of Human Immunodeficiency Virus Type 1 Replication in Human Blood Derived Macrophages Through Modulation of Coreceptor Expression; S.M. Harrold, et al. 6. Direct vs. Indirect Modulation of Complex in vitro Human Retroviral Infections by Morphine; S.B. Nyland, et al. 7. Genetic Factors Involved in Central Nervous System/Immune Interactions; R.L. Wilder, et al. 8. Interactions of Opioid Receptors, Chemokines and Chemokine Receptors; I. Szabo, et al. 9. Crosstalk between Chemokine and Opioid Receptors Results in Down-modulation of Cell Migration; I. Szabo, T.J. Rogers. 10. Morphine Upregulates Kappa-Opioid Receptors of Human Lymphocytes; S. Suzuki, et al. 11. Effects of Morphine on T-Cell Recirculation in Rhesus Monkeys; R.M. Donahoe, et al. 12. Mitogen Induced Activation of Mouse T Cells Increases Kappa Opioid Receptor Expression; J.M. Bidlack, M.K. Abraham. 13. Self Enhancement of Phagocytosis by Murine Resident Peritoneal Macrophages and its Relationshipto Morphine Effects on the Process; W.E. Pagan, et al. 14. Role of Mu-Opioid Receptor in Immune Function; S. Roy, et al. 15. Opiates Promote T Cell Apoptosis Through JNK and Caspase Pathway; P. Singhal, et al. 16. Role of Beta-Endorphin in the Modulation of Immune Responses: Perspectives in Autoimmune Diseases; P. Sacerdote, et al. 17. Modulation of FAS/FASL in a Murine Retroviral Infection by AZT and Methionine Enkephalin; R. Bowden, et al. 18. Acute Effects of Heroin on the Cellularity of the Spleen and the Apoptosis of Splenic Leukocytes; K. Fecho, D.T. Lysle. 19. Alteration of Early T Cell Development by Opioid and Superantigen Stimulation; L.E. McCarthy, T.J. Rogers. 20. Effect of Opioids on Oral Salmonella Infection and Immune Function; T.K. Eisenstein, et al. 21. Altered T-Cell Responsiveness in Morphine `Tolerant' Rats: Evidence for a Potential Role of the Paraventricular Nucleus of the Hypothalamus; R.D. Mellon, et al. 22. Actions of Endotoxin and Morphine; S. Chang, et al. 23. Pharmaconeuroimmunology in the Intestinal Tract: Opioid and Cannabinoid Receptors, Enteric Neurons and Mucosal Defense; D.R. Brown, et al. 24. Cannabinoid-Mediated Inhibition of Inducible Nitric Oxide Production by Rat Microglial Cells: Evidence for CB1 Receptor Participation; G.A. Cabral, et al. 25. Modulation of CB1 mRNA Upon Activation of Murine Splenocytes; S.N. Noe, et al. 26. Downregulation of Cannabinoid Receptor 2 (CB2) Messenger RNA Expression During in vitro Stimulation of Murine Splenocytes with Lipopolysaccharide; Sumi Fong Lee, et al. 27. CB1 and CB2 Receptor mR